Berlin 2024 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 16: Poster Ia
MM 16.14: Poster
Monday, March 18, 2024, 18:30–20:30, Poster E
Effect of Ilmenite reduction pathway on TiFe hydrogen storage properties obtained by Sieverts apparatus measurement — •Matthieu Ramond1,2, Alexander Haack1,2, Gabby Hunter-Smith3, Mohammad Zarar3, Karl Shaffer4, Karl Dahm5, Chris Bumby3, Paul Jerabek2, Thomas Klassen2,6, Nigel Lucas1,7, and Claudio Pistidda2 — 1University of Otago, Department of Chemistry, Dunedin, New Zealand — 2Helmholtz-Zentrum Hereon, Institute of Hydrogen Technology, Geesthacht, Germany — 3Victoria University of Wellington, Paihau-Robinson Research Institute, Wellington, New Zealand — 4Victoria University of Wellington, Ferrier Research Institute, Wellington, New-Zealand — 5Callaghan innovation, Lower Hutt, New Zealand — 6Helmut Schmidt University, Faculty of Mechanical Engineering, Institute of Materials Science, Hamburg, Germany — 7MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, New Zealand
New Zealand has large quantities of naturally occurring ilmenite (TiFeO3) ore. Samples of this easily available oxide were thermally reduced to a titanium-iron alloy under a variety of experimental conditions, e.g., temperatures, durations, and grind sizes at Victoria University of Wellington. After thermal activation under dynamic vacuum, hydrogen adsorption and desorption cycles were measured. The hydrogen uptake properties of the alloys can be determined using a specially-built Sieverts apparatus. The gravimetric storage and kinetics of the samples were evaluated by numerical fitting, enabling these properties to be linked to the reduction process.